A gruesome combat between a hunter and a furious momma bear.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

This 18th-century sundial was designed to calculate the date of Easter each year.

The approximate spot where the last Grand Master of the Knights Templar was put to death.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

The narrowest street in Paris.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

This museum houses an imposing skeleton army comprised of creatures great and small.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This medieval church in Rome was almost destroyed following a terrorist attack in 1993.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This is the oldest Roman-made bridge in the city still existing in its original state.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

2300-year-old Roman road connecting the empire.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Rome’s legendary peephole vista is also a former Crusader stronghold.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.